Image data coding apparatus and method

Details Image data coding apparatus and method Image data coding apparatus and method

1994-04-05

1996-05-28

Tran, Thai Q.

Television

Bandwidth reduction system

Data rate reduction

3582612, 382245, H04N 734

Patent

active

055216412

ABSTRACT:
An image data coding apparatus and method to achieve a scale-down of a circuit without sacrificing compression efficiency. Input image data is delayed in a delay circuit and a coincidence detector compares the image data and delay image data to output a coincident code when these two are the same. An adaptive run length counter adaptively switches to select either a coincident code run length of a continuous length of the coincident codes calculated at an output time of the coincident codes or an image data run length of a continuous length of the same codes of the image data calculated at a non-output time of the coincident codes and outputs an adaptive run length. A Huffman coder carries out a Huffman coding of the adaptive run length.

REFERENCES:
patent: 4040093 (1977-08-01), Nakagome et al.
patent: 4134133 (1979-01-01), Teramura et al.
patent: 5319469 (1994-06-01), Moolenaar
Hatori, "Introduction to Image Data Compression: (4) Image Data Coding Algorithm I--Predictive Coding", 1989, Television Society of Japan Proceedings V43, N9, pp. 949-956.

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